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CHEMICAL ASPECTS OF THE USE OF SOLUBLE POISONS FOR REACTIVITY CONTROL IN CANDU. II. REACTOR POISON DEPOSITION ON MODERATOR SYSTEM SURFACES

Technical Report ·
OSTI ID:4819582

The deposition of boron from boric acid and cadmium from cadmium sulfate solutions on Zircaloy, stainless steel, and aluminum was measured. On Zircaloy and stainless steel the amount deposited will have a negligible effect on reactivity in CANDU. Cadmium sulfate is recommended as the preferred soluble poison with the provision that the equivalent pH of the moderator be maintained at 6 or below. The small amount of deposition found can be explained in terms of ion exchange on the oxide filmcovering the metal. (auth)

Research Organization:
Atomic Energy of Canada Ltd., Chalk River, Ont.
NSA Number:
NSA-16-007519
OSTI ID:
4819582
Report Number(s):
CRCE-1039; AECL-1389
Country of Publication:
Canada
Language:
English